UE Self-Interference Measurement Using Hybrid Power Configuration

Solution Overview

Problem

User equipment (UE) experiences self-interference (SI) due to signal reflection and leakage, which interferes with its own reception, and existing methods are inadequate in effectively measuring and mitigating this interference.

Innovation Solution

The UE performs self-interference measurement (SIM) using a hybrid transmission power configuration, employing lower power for near-field SI and higher power for clutter echo SI, with adjustable repetition frequencies and power levels to optimize interference mitigation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If higher transmission power is used for SIM, then measurement precision of clutter echo SI is improved, but power consumption increases and impact on other communications worsens

Engineering Contradiction:

Improvemeasurement precisionVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent applies local quality by using different transmission power levels for different SIM purposes: lower power for near-field SI measurement and higher power for clutter echo SI measurement. This allows each measurement type to receive the appropriate power level locally, optimizing measurement precision while minimizing unnecessary power consumption.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses partial action by transmitting SIM signals only during specific time intervals (e.g., during uplink slots or specific subframes) rather than continuously. This partial transmission approach provides sufficient measurement data while reducing overall power consumption and interference impact on other communications.

Inventive Principle:

Principle #16Partial or excessive action

2Measurement precision

If higher transmission power is used for SIM, then measurement precision of clutter echo SI is improved, but impact on other communications worsens

Engineering Contradiction:

Improvemeasurement precisionVSAvoidinterference to other communications

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by using different transmission power levels for different SIM purposes: lower power for near-field SI measurement and higher power for clutter echo SI measurement. This allows each measurement type to receive the appropriate power level locally, optimizing measurement precision while minimizing unnecessary interference to other communications.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses periodic action by transmitting SIM signals at specific intervals and time slots rather than continuously. This periodic transmission provides sufficient measurement opportunities while reducing the overall interference impact on other communications by leaving gaps between transmissions.

Inventive Principle:

Principle #19Periodic action

3Use of energy by moving object

If lower transmission power is used for SIM, then power consumption is reduced, but measurement precision of near-field SI deteriorates

Engineering Contradiction:

Improvepower consumptionVSAvoidmeasurement precision

Core Design Contradiction:

Use of energy by moving objectVSMeasurement precision

Solution Approach 1:

The patent applies local quality by using different transmission power levels for different SIM purposes: lower power for near-field SI measurement and higher power for clutter echo SI measurement. This allows each measurement type to receive the appropriate power level locally, optimizing measurement precision while minimizing unnecessary power consumption.

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP4183068B1Power configuration of self-interference measurement

Publication Date: 2026.04.15 QUALCOMM INC

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AI summary

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may experience multiple types of self-interference (SI), perform interference measurement procedures, and may identify interference mitigation procedures. The UE may identify a configuration for performing SI measurements (SIMs), where the configuration indicates a first transmission power associated with a first transmission and a second transmission power associated with a second transmission, where the second transmission power is higher than the first transmission power. The UE may transmit the first transmission at the first transmission power and the second transmission at the second transmission power, where the first transmission is associated with a first repetition frequency and the second transmission is associated with a second repetition frequency. The UE may measure SI based on transmitting the first transmission and the second transmission.